(360, Dobruja – 430/435, Marseille). Born in a Christian home, Cassian undertook a pilgrimage to Palestine and Egypt, where for more than a decade he was a student of the monastic fathers. During the Origenistic controversies he left Egypt c. 399/400, went to Constantinople and John Chrysostom, went to Rome after the latter's banishment, and ultimately settled in southern Gaul, where in 415 he founded a monastery and a convent.
With his writings, in which he reflected on the experiences of ascetic life, he became the teacher of western monasticism (Benedict, Rule of). In D…